'Biggest Loser' Star -Big Fat Liar ... Allegedly

2/10/2010 2:25 PM PST

'Biggest Loser' Star - Big Fat Liar ... Allegedly

Based on the weight of the evidence "The Biggest Loser" star Jillian Michaels is pulling a dietary fast one on the American public for profit ... according to a new class action lawsuit.

According to documents filed in L.A. County Superior Court, the Jillian Michaels Maximum Strength Calorie Control dietary supplement is "worthless."

The lawyer who filed the suit, Melissa Harnett, tells TMZ, "Telling people you take two magic pills and then eat chocolate cake all day is a deception."

The suit alleges, "Sadly, Michaels has decided to exploit her fame and goodwill by collaborating with Thin Care and Basic Research to promote a weight loss supplement that purportedly will cause weight loss by itself, without any additional effort on the part of the consumer."

The suit asks for an injunction prohibiting the sale of the product, plus damages.UPDATE: Jillian has released the following statement:

"Unfortunately, anyone can file a lawsuit in California. All it takes is a $355 filing fee. That research was reviewed by some of the leading weight-loss experts in the world before Jillian would put her name on the product.

The lawsuit will be handled in the courts like all other lawsuits, and we are confident we will prevail."